Drill.



J. D. TULLY.

DRILL. APPLICATION FILED MAR. 26, 1908.

Patented Dec. 22, 1908. 4 SHEETS-SHEET 1.

BYWM

' WITNESSES A 7'TOHNEYS 1n: norms PETERS 50., wAsulNcwou, 11c.

J. D. TULLY.

DRILL.

APPLICATION FILED MAR. 28, 1908.

Patented Dec.22,1908

4 SHEETS-SHEET 3 INVENTOH dorm D.TuLLY,

ATTORNEYS WITNESSES J. D. TULLY'.

DRILL. APPLICATION FILED MAB. 26,1908.

Patented Dec; 22, 1908.

4 SHEETS-SHEET 4.

INVENTOI? TULLY,

(JOHN D. I

k By ATTORNEYS THE" NORRIS FEJERS 02., WAsHINcron, 0.1:.

JOHN D. TULLY, OF PEARL, COLORADO.

DRILL.

Specification of Letters Patent.

Application filed March 26, 1908.

Patented Dec. 22, 1908.

Serial No. 23,370.

To all whom it may concern:

Be it known that I, J OHN D. TULLY, a citizen of the United States, residing at Pearl,

in the county of Larimer and State of Colorado, have invented a new and useful Improvement in Drills, of which the following is a specification.

This invention relates es ecially to drills used in mining or rock worli and has for its object to provide improved means for operating a plurality of drills from a single source of power, the construction and arrangement of the apparatus being such that a gang of drills may be placed along in a row, either in a straight or crooked line and at the same or slightly different levels, and connected to each other and to a single source of power, the particular connecting means being shafts and tumbling joints, by means of which the power is transmitted. Clutches are provided at each drill, so that one or more drills may be stopped as desired, and friction clutches are used, so that if one drill becomes caught its clutch will slip and the others continue to operate.

A further object of the invention is to provide improved means for operating the drill rod, said means consisting of a sprocket chain driven by the shaft above referred to and having arms which engage a collar on the drill rod, to lift the rod and allow the same to drop after the arm passes off the collar, the action also causing a partial turn of the rod.

A further object of the invention is to provide improved means for supplying water to the drills.

A further object is to form improved meians for supporting and guiding the drill r0 With these and other objects in view the invention is hereinafter more particularly described, and is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a gang of connected drills of the solid type. Fig. 2 is a similar view of a gang having hollow drills through which water is supplied. Fig. 3 is a side elevation of one of the drills and its supporting tripod and associated parts. Fig. 4 is a sectional view on the line 44 of Fig. 3, showing the clutch devices and part of the sprocket gearing. Fig. 5 is a plan view of the top guide for the drill rod. Fig. 6 is a sectional view showing hollow drill rod sections screwed together.

In Fig. 1, a gang of drills is shown having solid drill rods. Each drill has its tripod with legs 10 and a horizontal shaft section 11 mounted in bearings on a frame 12 supported by two legs of the tripod. The shaft sections of the respective drills are connected together by shaft sections 13 and tumbling joints 14, which allows the several drills to be set at various angles or elevations with respect to each other. Power is transmitted by means of the shaft and the various drills are thereby driven, and the tumbling joints are removably connected as by set screws 15 which allows connecting shaft sections of any desirable or necessary lengths to be used. At the head of the gang of drills a gas engine 16 or other motor is operatively connected to the shaft to furnish the necessary power to drive the drills. In order to supply water to each of the drills a line of hose is supported on the tripods, leading from a tank 18 or other source of water, and the hose has valved branches 19 tapped off to each drill, and the ends of the branch pipes may be inserted in the drilled holes after they are started, to supply water thereto.

In Fig. 2 a modification is shown, hollow drills being used and the water pipe line 17 is carried by brackets 20 at the top of the tripods, with branch pipes 19 connected to the top of the hollow drills. These may be made in sections, with screw joints as shown at 21 in Fig. 6 making a smooth joint which will not interfere with the action of the drill rods as hereinafter described. Each drill has a tripod, two of the legs of which are extensible, as indicated at 10 (Fig. 3) and these are set at the top into a block 22, and the third leg is hinged to the block as at 23. The block 22 has a pair of jaws 24 (see Fig. 5) hinged thereto as at 25, to open horizontally, and provided with a hook 26 whereby they may be held closed as long as desired. The drill rod 27 (which is preferably noncircular) works up and down through a guide opening 28 between the aws. A lower guide 29 for the drill rod is formed on one of the bars of the frame 12, with an openable latch or stra 29 The shaft section 11 of each drill has lbose thereon a sprocket wheel 30 which is confined on one side by a fixed collar 31 on the shaft and on the other side has a friction clutch member 32 the other member 33 of which is slidable to and from engagement therewith, being normally held engaged by a spring 34 coiled around the shaft. A hand lever 35, fulcrumed on the frame 12, may be.

shifted to disengage the clutch, and engaged in a notch 36 in one of the bars 12 to hold the parts out of engagement. Thus the wheel 30 can be started or stopped as desired without sto ping the line of shaft sections, and if the dril becomes cau 'ht during operation, the clutch will slip, allowing the other drills to continue. The wheel 30 drives a sprocket chain 37 which has a triangular run around also sprocket wheels 38 and 39 the former being carried in an extension frame 40 on the side of the frame 12 and the latter being carried on an upper frame 41 mounted on the tripod legs. The bearing boxes 42 of the wheel 38 are adjustable to take up slack of the chain. The said chain has a vertical run between the wheels 30 and 39, beside the drill rod, and is provided with one or more projecting arms 43 adapted to strike and lift a catch collar 44 on the drill rod. This collar is loose on the drill rod and normally drops thereon to the guide 29, but when engaged at one side or edge and thereby lifted and tilted it will bind againstthe angles of the drill rod and clutch or catch and lift the same therewith. As the chain travels each arm comes up under the collar and causes the same to clutch the rod thereby lifting the latter until the arm, passing around the wheel 39, slips off the collar, allowing the drill and collar to drop, thereby producing the stroke of the drill, which is obviously repeated while the chain continues running. The chain is not set directly opposite or in line with the drill rod, but slightly to one side thereof, so that the lifting arm enga es the collar tangentially, rather than radia ly, and it follows that as the arm wipes off the collar at the top ofthe lift it has a turning action or effect thereon which causes the drill (when at its highest point) to turn slightly 011 its axis before it drops, which is necessary for well known reasons. When the drill has gone deep enough to guide itself in the hole made thereby, the hook 26 is unhooked and the guide jaws 24 swung open, and there is then no danger of the up er end of the drill catching on the upper guic e when it has worked down far enough to fall below the same.

The apparatus may be set up and operated under various conditions, temporary or otherwise, and at less cost than a compressed air outfit. A gang of drills can be operated by comparatively small power, and the number of drills can be increased or diminished as desired. Any selected drill or drills can be stopped on occasion, without stopping the others. The drills can be set as far apart as desired, by having shaft sections to reach.

Various modifications may be made within the scope of the invention. suitable stroke mechanisms for the drill rods may be used. A small gasolene engine can be quite readily moved about, with the drills, and so worked wherever needed. One can attend the engine and a gang of drills, and make changes in the drills wherever necessary.

It will be understood that the turning joint may also be made to slip on the square ends of rods or shafts, and the drill stems can also be round and operate in accordance with the broad principles of my invention. The tripod can be weighted to make it stand firm in use.

In operation the drills can be used in sinking a shaft,- but are more especially adapted for 0' en out work or use in a quarry.

I c aim 1. A drilling apparatus comprising a series of drills, a line shaft formed in sections with connecting universal joints and operatively connected to the respective drills, and means to drive the shaft.

2. A drilling apparatus comprising a series of drills, a flexible line shaft connecting the same, means to drive the shaft, and operative connections between the shaft and the respective drills, including a yielding clutch JOHN D. TULLY. Witnesses:

W. B. GILMORE, CLELLA BROWN.

Especially other 

